package com.yundasys.lab10designpattern.observer;

/**
 * @PACKAGE_NAME: com.yundasys.lab10designpattern.observer
 * @NAME: Observer
 * @USER: jiangta
 * @DATE: 2021/11/4
 * @TIME: 9:12 上午
 * @PROJECT_NAME: springboot-labs
 */
public abstract class Observer {

    protected Subject subject;

    public abstract void update();
}
